Dia Tub-Shower Systems 3520-B, 3521-B, Series Installation and Service Instructions Model Number Series 3520-B... Shower Valve 3521-B... Shower System... Tub/Shower System Modifications -1.5... 1.5 gpm (5.7 L/min) flow restrictor -SH2...Round, 3 mode showerhead -SH3... Round,1 mode showerhead -SH4...Square, 1 mode showerhead -T2...Diverter tub spout Need Help? Symmons customer service: (800) 796-6667, (781) 848-2250 customerservice@symmons.com Mon - Fri 7:30 am - 7:00 pm EST www.symmons.com/service Technical help Product information Warranty policy Visual Guide Dia Tub-Shower Systems, 3520-B, 3521-B, Series Tools & Materials Arm and flange 300S 3521-B 3/32" Showerhead Modifications 352SH-3 (-SH2) 362SH (-SH3) 361SH (-SH4) 4 mm 1 2 3 4 Showerhead 352SH 3520-B 3521-B Screwless escutcheon kit RTS-009, brass Mounting plate, T-177 Temp Limit stop screw Temptrol Control Valve 46-2-BODY 46-2X-BODY Handle kit T-03387 HOT supply inlet COLD supply inlet 3/32" Dome cover Escutcheon Escutcheon mounting plate 3520-B 3521-B Note: Piping, fittings and tools are not included. Actual plumbing should be determined and installed by a licensed plumber. Protective valve shield (not shown) T-176 Tub spout 057 4 mm Tub Spout Modification 361DTS (-T2)
Installation Instructions Rough-in Installation Control valve assembly, piping and fittings (Note: Illustrations below show valve model without stops) Reference as required: Page Visual guide...1 Dimensions illustration...4 1) Determine wall thickness Determine type of wall and wall thickness where valve will be mounted. Consider whether to use mounting plate by reviewing figure 2 below. Skip ahead to Step 3 if mounting plate is not used. 2) Attach valve mounting plate Seat mounting plate against valve assembly as illustrated in figure 1. Figure 1 Mounting plate 3) Attach protective shield Reference figure 2 to determine whether shield is required. Attach protective shield by snap fitting over end of valve spindle. 4) Install piping, fittings and control valve Piping and fittings not supplied Control Valve Install through cutout hole in wall as specified in figure 2 below and dimension illustration on page 4. Showerhead (S on valve) Pipe from outlet port on valve marked S to showerhead mounting arm location. Hot & Cold Supply (H & C) Pipe hot water supply to valve inlet marked H and cold water supply to valve inlet marked C. Tub Spout (T on valve) Pipe from outlet port on valve marked T to tub spout. Important! Do not substitute Tub Spout with restrictive fittings such as PEX, CPVC or outlet accessories such as a ledge spout, hose and spray that would subject the valve to excessive internal back pressure, otherwise operation will be compromised. 5) Remove protective shield If protective shield was attached in Step 3 then remove shield snap fitted over the end of valve spindle once valve is securely installed and wall finish work has been completed. 6) Adjust valve packing nut Reference figure 3 below Turn hot & cold supplies on. Valve will not operate unless both hot and cold water supply pressures are turned on. Place handle over end of control spindle stem. Adjust packing nut for positive frictional resistance as handle is rotated from shutoff position across adjustment range. Temp Limit stop screw packing nut control spindle stem wall Figure 3 Valve adjustments Walls for using T-177 valve mounting plate Fiberglass or acrylic walls (required) Plaster or other type walls (optional) 1/16" (2 mm) min 1/2" (13 mm) max Protective shield When mounting plate is used, then shield is optional for protecting end of valve during installation. "snap on-off" p/n T-176 p/n T-177 finished wall Ensure valve s mounting plate is flush against inner wall Dry wall, plaster or other type wall 1/2" (13 mm) or greater finished wall 2-3/8" ± 1/2" (60 mm ±13 mm) pipe centerline to finished wall Finished wall must be flush with back side of protective shield surface Protective shield "snap on-off" (required when valve mounting plate is not used) wall cutout hole size 3-1/2" (89 mm) min 4" (102 mm) max wall cutout hole size 3-1/2" (89 mm) min 4" (102 mm) max Figure 2 Mounting valve Page 2
7) Flush system, check for leaks Turn valve to the warm position and run for a few minutes. If system is dirty, remove valve spindle in center of valve to ensure proper flushing. (See service instructions.) Check for leaks around valve assembly and all pipe fittings. 8) Set Temp Limit stop screw Reference page 2, figure 3 The temperature limit stop screw limits valve handle from being turned to maximum position resulting in excessive hot water discharge temperatures. Warning: Failure to adjust Temp Limit stop screw properly may result in serious scalding. Place handle on control spindle stem and open valve to maximum desired temperature. Turn Temp Limit stop screw clockwise until it seats. Note: Do not install positive shutoff devices on control valve outlet or devices that do not allow the valve to flow at least 1.5 gpm. 2) Attach escutcheon 3) Attach dome cover 5) Attach showerhead 6) Attach tub spout 4 mm -T2 2 1 Tub-Shower Operation Trim Installation Control handle ON-OFF Adjust water temperature 1) Attach escutcheon mounting plate 4) Attach handle OFF ON COLD HOT factory installed gasket 3/32" Care and Cleaning Clean finished area using mild soap and water or a non-abrasive cleaner and then quickly rinse. A nonabrasive wax may be used to preserve finish area. Page 3
Dimensions Dia Tub-Shower Systems, 3520-B, 3521-B, series E A F Floor G C H M B I L N J D K A B C D E F G H I J K L M N O P Q R S T U V Measurements Ø 2 1/2", 64 mm 6 3/4", 171 mm 77", 1956 mm 3 1/2", 89 mm Ø 7 1/2", 191 mm Ø 2 1/2", 64 mm Ref. 32", 813 mm (3502-B) Ref. 42", 1067 mm (3500-B, 3501-B) 12", 305 mm 3", 76 mm 2 7/8", 73 mm Rough-in 2 3/8" ± 1/2", 60 mm ± 13 mm 5 1/2", 140 mm Male 1/2-14 NPT fitting must protrude 5 1/2" (140 mm) from finished wall 7", 178 mm 6 3/4", 171 mm 6", 152 mm 5 5/8", 143 mm 2 1/4", 57 mm 2 3/4", 70 mm 3/8", 10 mm 6 1/2", 165 mm Female 1/2-14 NPSM fitting must be recessed 3/8 (10mm) from finished wall -SH2 O -SH3 P -SH4 -T2 Q R S U T V Notes: 1) All dimensions measured from nominal rough-in (see K as reference). 2) Dimensions are subject to change without notice. Page 4
Parts Assembly Temptrol Shower & Tub-Shower Control Valves 46-2-BODY...Shower valve, Tub-Shower valve 46-2X-BODY...Shower valve w/stops, Tub-Shower valve w/stops Temptrol valve 46-2-BODY Service stop kit (T-52) Removal tool Service stop kit & removal tool (T-55C) HOT & COLD seat repair kit (TA-4) COLD seat removal tool (T-35B) Shower supply outlet Temptrol valve 46-2X-BODY HOT supply inlet COLD supply inlet Retainer HOT seat removal tool (T-35A) Control spindle & cap assembly (TA-10 & T-12A) Shower only Tub supply plug Tub-Shower Tub supply outlet Service stop and retainer kit (T-52) service stop retainer Control spindle washer repair kit (TA-9) Cap assembly (T-12A) HOT seat hot washer screw hot washer cold washer retainer cold washer cap gasket Cap washer repair kit (T-16) COLD seat cap gasket cap limit stop screw o-ring washer packing packing nut Control spindle assy. (TA-10) Temp Limit stop adjust Temptrol Valve Replacement Parts and Optional Tools Symmons Valve Body Type Part Number 46-2-BODY 46-2X-BODY Description TA-4 HOT & COLD seat repair kit... (optional tool p/n T-35A/B) TA-9 Control spindle washer repair kit TA-10 Control spindle... (includes p/n TA-9 & T-16 components) T-12A Cap assembly T-16 Cap washer repair kit T-35A/B HOT seat removal tool, T-35A & COLD seat removal tool, T-35B T-52 Service stop spindle & retainer T-55C Service stop spindle, retainer & removal tool T-108 Reverse seat & tool kit (valve HOT & COLD supply inputs are reversed) Page 5
Trouble Shooting Chart Problem Cause Solution Valve will not pass water. Both hot and cold water supplies are not turned on. Turn on both supplies. Valve will not operate unless both hot and cold water pressure is on. Valve leaks when shut off. Temperature control handle is turned from cold to hot (or hot back to cold) and volume from spout or head is not constant. Valve delivers sufficient quantity of cold, but little hot, or the reverse. Temperature varies without moving handle. Valve delivery temperature reduces gradually during use; handle must be turned to hotter positions to maintain constant temperature. Valve delivers hot water when initially opened. Water turns colder as handle is rotated in a counter-clockwise direction toward the hot position. Hot and cold washers are worn or foreign matter (dirt, chips) is lodged between washers and seat surfaces. Pressure-balancing piston housed in spindle assembly is restricted from free movement by foreign matter. Overdraw on hot water supply (i.e. running out of hot water). Valve is piped incorrectly (i.e. the hot supply is piped to the valve s cold inlet and the cold supply is piped to the hot inlet.) 1) Replace washers using control spindle washer repair kit, p/n TA-9. 2) Replace hot & cold seats using hot/cold seat repair kit, p/n TA-4. 1) Open valve halfway, remove handle and tap spindle with plastic hammer. 2) Check water pressure balancing piston in control spindle. See service instructions. 3) Replace control spindle, p/n TA-10. Reduce maximum flow by using volume control adjustment on valve or showerhead. This will allow longer period of use before overdrawing hot water supply. If piping is accessible, correct connections to the valve. If piping is not accessible, order a reverse seat and tool kit, p/n T-108. Older installations may also require replacing the hot seat, hot/cold seat repair kit, p/n TA-4. Service Instructions Removing control spindle assembly (Ref. parts assembly figure) Shut off water supply to valve and remove control valve handle and dome cover. Remove escutcheon plate by first removing escutcheon screws. Turn valve s control spindle to half way position between minimum and maximum rotation. Important: Failure to do this can damage control spindle assembly. Unscrew both spindle cap and control spindle assembly. Hot/Cold seat repair kit Order p/n TA-4, T-35A and T-35B. Installation requires both hot & cold removal tools, p/n T-35A & T-35B. Remove control spindle assembly. Remove both seats with removal tools. Replace both seats even if only one appears worn. Install and tighten both seats to 15 foot pounds of torque. Control spindle washer repair kit Order p/n TA-9. Remove control spindle assembly. Remove cold washer by holding spindle using valve handle and unscrew cold washer retainer using channel lock pliers. Remove hot washer by removing hot washer screw. Checking water pressure balancing piston The perforated end of the control spindle assembly houses the water pressure-balancing piston which is the heart of the valve. Remove control spindle assembly. Shake spindle assembly and listen for clicking noise. Piston should be free to slide back and forth the full length of its travel. If piston appears restricted then do the following: (1) Tap the handle or stem end of the spindle against a solid object to free the piston. (2) Try soaking in household vinegar and repeat step (1). If unable to free piston, replace control spindle, p/n TA-10. Important: Do not attempt removal of the piston. Valve re-assembly Reassemble by reversing above procedures. After the control spindle assembly (TA-10) is threaded back into the spindle cap assembly (T-12A) ensure control spindle is rotated 1/2 turn clockwise from its maximum counter clockwise rotational position. Failure to do this will damage assembly. Symmons Industries, Inc. 31 Brooks Drive Braintree, MA 02184 Phone: (800) 796-6667 Fax: (800) 961-9621 Copyright 2017 Symmons Industries, Inc. symmons.com gethelp@symmons.com ZV-3170 REV 0 030617